/*
 *********************************************************************************************************
 *                                                uC/GUI
 *                        Universal graphic software for embedded applications
 *
 *                       (c) Copyright 2002, Micrium Inc., Weston, FL
 *                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
 *
 *              �C/GUI is protected by international copyright laws. Knowledge of the
 *              source code may not be used to write a similar product. This file may
 *              only be used in accordance with a license and should not be redistributed
 *              in any way. We appreciate your understanding and fairness.
 *
   ----------------------------------------------------------------------
   File        : GUI_OnKey.c
   Purpose     : Implementation of GUI_StoreKeyMsg
   ---------------------------END-OF-HEADER------------------------------
 */


#include "GUI_Protected.h"

static int _Key;
static int _KeyMsgCnt;
static struct
{
    int Key;
    int PressedCnt;
} _KeyMsg;

GUI_KEY_MSG_HOOK* GUI_pfKeyMsgHook;

/*********************************************************************
 *
 *       Public code
 *
 **********************************************************************
 */

/*******************************************************************
 *
 *                  GUI_GetKey
 */

extern int sys_getchar(void);
int GUI_GetKey(void)
{
    return sys_getchar();
}

/*******************************************************************
 *
 *                  GUI_StoreKey
 */

void GUI_StoreKey(int Key)
{
    if (!_Key)
    {
        _Key = Key;
    }
}

/*******************************************************************
 *
 *                  GUI_ClearKeyBuffer
 */

void GUI_ClearKeyBuffer(void)
{
    while (GUI_GetKey())
    {
        ;
    }
}

/*********************************************************************
 *
 *     GUI_StoreKeyMsg
 */
void GUI_StoreKeyMsg(int Key, int PressedCnt)
{
  #if GUI_WINSUPPORT    /* If 0, WM will not generate any code */
    _KeyMsg.Key = Key;
    _KeyMsg.PressedCnt = PressedCnt;
    _KeyMsgCnt = 1;
  #else
    GUI_USE_PARA(PressedCnt);
    GUI_StoreKey(Key);
  #endif
}

/*********************************************************************
 *
 *     GUI_PollKeyMsg
 */
#if GUI_WINSUPPORT    /* If 0, WM will not generate any code */
int GUI_PollKeyMsg(void)
{
    int r = 0;

    if (_KeyMsgCnt)
    {
        int Key;
        Key = _KeyMsg.Key;
#if 0
        if (WM_OnKey(Key, _KeyMsg.PressedCnt) == 0)
        {
            if (_KeyMsg.PressedCnt == 1)
            {
                GUI_StoreKey(Key);
            }
        }
#else
        WM_OnKey(Key, _KeyMsg.PressedCnt);
        if (_KeyMsg.PressedCnt == 1)
        {
            GUI_StoreKey(Key);
        }
#endif
        _KeyMsgCnt--;
        r = 1;          /* We have done something */
    }
    return r;
}
#endif

/*********************************************************************
 *
 *     GUI_SendKeyMsg
 *
 * Purpose:
 *   Send the key to a window using the window manager (if available).
 *   If no window is ready to take the input, we call the store routine
 *   and wait for somebody to poll the buffer.
 */
void GUI_SendKeyMsg(int Key, int PressedCnt)
{
  #if GUI_WINSUPPORT    /* If 0, WM will not generate any code */
    if (!WM_OnKey(Key, PressedCnt))
    {
        GUI_StoreKeyMsg(Key, PressedCnt);
    }
  #else
    GUI_StoreKeyMsg(Key, PressedCnt);
  #endif
}


